Mechanically-operated grate.



H. BAUER. MECHANICALLY OPERATED GRAT'E.

APPLICATION FILED NOV. 6. 1'91'5.

Pat-embed. Apn 24, 1917.

2 S'HEETFSHEET I.

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H. BAUER.

MECHANICALLY OPERATED GRATE.

ArPucATlou-meu'riov. 6. m5.

Patented Apr. 24

2 sums-sun 2.

ETJELI HUGO BAUER, or VIENNA, AUSTRIA, ASSIGNOR 0F ONE-HALF T0 0'.

serum, or VIENNA, AUSTRIA.

mes.-

SCI-IEMBER do MECHANICALLY-OPERATED GRATE.

Specification of LettersIatent.

Patented Apr. 2%, 191 7.

Application filed November 6, 1915. Serial No. 59,912.

To all whom it may-concern:

Be it known that I, Hnoo BAUER, an engineer by occupation, subject of the Emperor of Germany, residing at 51 Gentzgasse, Vienna, XVIII, in the Empire of Austria, have invented certain new and useful Improvements in Mechanically-Operated Grates, of which the following is a specification.

In the mechanically operated grates already known, the movement of the bars is generally such as to cause each point of the bar to describe a closed curve, the result being that the fuel is moved in two directions vertical to each other.

Moreover, in arrangements of the said kind, the inertia of the fuel is inadequate to cause the fuel to travel across the whole grate, or to obtain a uniform deposit of ashes, or finally to secure a good regulation -of the supply from the hoppers. For this reason, the inertia of the fuel requires to be ner of charging the fuel, and the like, some.

supplemented by the gravity thereof and, in consequence, the grate must always be arranged at a greater or smaller inclination. Notwithstanding, the movement of the fuel and the clinkers is not efficient enough to prevent the fuel either from caking, sticking to the grate and partially choking the useful grate area. In addition, the speed at which the fuel travels across the surface of the grate depends upon many circumstances, such as the speed of the grate bar, the inclination of the surface of the grate, the curved line described by the grate, the manof which cannot be controlled, so that the said speed cannotbe regulated with entire safety. It consequently follows that different kinds of fuel cannot be employed upon one and the same grate, since several of the aforementioned circumstances do not admit of being altered or controlled at will.

The present invention relates to a mechanically operated grate, in the case of which, in contradistinction to the arrangements hitherto known, the movement of the bars takes place in one direction only, so that they merely execute a straight-linear movement comprising a slow forward and a sudden return mov'ement back into the initial position.

'fuel is prevented by the inertia thereof, so

that the advance of the fuel for a certain unit of time, depends entirely upon the distance traversed during a certain unit of time by the grate bar; in other Words, it depends upon the said distance and the number ofadvance motions executed.

Under these circumstances it is possible by regulating both the distance and the number of advance motions to'be executed, to exactly dimension the movement of the fuel, irrespective of other circumstances, so that different kinds of fuel may be employed on one and the same grate.

It is likewise understood that the grate does not require to be arranged at any inclination whatsoever. Thesimple straightlinear movement, the possibility of a horizontal arrangement of the grate, and the easy mode of regulating thespeed at which it is intended thefuel shall travel across the grate, constitute advantages-such as are not obtainable by simple means in connection with the constructions hitherto known.

The accompanying drawings illustrate, by way of example, a constructional embodi-' ment of my invention, Figure 1 showing a horizontal section and Fig. 2 a plan view of the grate, while Fig. 3 shows a cross-section,

on anenlarged scale, of theagrate bars and the device by means of which they are actuated.

As will be seen from these drawings, the single bars a are movably disposed on the transverse bearers 5, Z). Each of the bars a is provided witha projection 0 adapted to the wall-portion L of the furnace. A hopper Z is arranged above the grate, having two openings provided with fire doors m which, in the event of the mechanical stoking of the grate getting out of order, will 1 and consists either of a revolution, the grate 4 projections e.

permit of the fuel being charged and raked by hand.

The furnace is closed above the grate by means of a movable wall 71-, provided with a feed regulator 0 adapted to be adjusted to any height desired, and thus controlling the depth of the fuel bed. The front wall of the furnace is arranged to swing about the axis 7) and is preferably weighted by a weight q in such a manner asto allow ofthe said axis being easily rocked.

For the purpose of removing the clinkers, a small auxiliary grate s is fixed to the rearend of the main grate. The said grate 18 supported by the transverse bearers 7), 7)

a single plate or a plurality of adjoining plates 8 a", These plates are likewise preferably movable, and that in a direction opposite to the movement executed by the grate bars, for the purpose of effecting the removal of the clinkers. To this end, each plate is suitably connected to a rod t which, in a manner similar to the bolt 5 carries a spring h at its front end abutting against a strap fixed to the front wall of the furnace and compressed by a collar i, fixed to the rod 1, when this latter is shifted outward. Moreover. each of the rods is provided with a projection c, which is likewise taken along by a tooth or projection (Z, fixed to the shaft 0, from which it is subsequently again released.

Since the number of plates 5, s", s is considerably less than the number of the grate bars, a movement of the auxiliary grate will only be effected at considerable intervals of time.

For the purpose of moving the s 8 the same teeth or projections employed as for moving the grate bars; however, if desired, a special set of teeth or projections (Z may be arranged on the shaft 6 between the teeth or projections (Z. A movement opposite to the one executed by the grate-bars, is preferably obtained by arranging the rods t at the opposite side in relation to the shaft 6. The path described by the rods 25 is preferably longer, this being obtained by correspondingly dimensioning the Furthermore, in order to always secure a larger interval of time be tween each two movements of the same plates,'the teeth or projections (5, serving to move the grate bars, are disposed to project radially from either side of the shaft, to the end that, each time the shaft 6 completes a bars are shifted forward twice, while at the same time since the teeth or projections (Z are disposed only on one side of the shaft) the bars 25 will be only actuated once.

The shaft 0 is arranged transversely to the grate bars a, and all the teeth or projections (.Z and (Z, carried thereon, are so distributed as to cause the least number of rods plates, 8 (Z may be to their normal positions,

, for receiving the possible to be moved simultaneously. In the event of teeth or projections d being provided for the plates s 8 s", on the shaft 0 between the teeth or projections (Z and similar thereto, then such said teeth or project-ions (Z will have to be distributed in a like manner to suitably prevent the plates from being moved at one and the same time.

\Vhenthe shaft is rotated,then alternately always one grate bar is shifted forward by the teeth or projections 17, these taking along the projections 1' while at the same time the springs h are compressed. The fuel resting on the moving grate bar is thus carried along in the course of the said slow forward movement. Thus by shifting the single bars forward in succession, the caking of the fuel will likewise be prevented.

After the tooth or projection (Z has moved past the projection w, the grate bar is jerked back under the action of the spring 71, the fuel remaining in its place in consequence of its inertia. The advancemovement accordingly effected, almost entirely corresponds to the path described by the grate The depth of the fuel bed is at the same time regulated by the feed regulator 0, which is adapted to slide up and down in guides arranged in the movable wall n.

After the fuel has been consumed, it is thrown by the grate bars on to the plates s 8 s, whence it is gradually dropped into the ash-pit u as a result of the movement imparted to the plates.

If, for some reason, the actuating device for the grate or the grate bars should happen to get out of order, then the movable front wall n is rockedabout its axis 1) until it is in a horizontal position, in which it is then secured. then be effected throu h the openings m formed in the hopper Vhat I claim is:

1. A mechanically operated grate comprising longitudinally movable, substantially horizontally arranged grate-bars, supports therefor, springs for holding said grate-bars in their normal positions, a continuously rotated actuating means for periodically moving-said grate-bars singly and at different times against the action of their springs, the springs rapidly returning the, grate-bars a supplementary grate arranged at the rear of said grate bars clinkers, said supplementary grate comprising longitudinally movable horizontal plates, and means for periodically moving said plates back and forth opposite to the movement of said grate-bars.

2. A mechanically movable grate comprising longitudinally movable, substantially horizontally arranged grate-bars, supports therefor, means, such as springs,

The stoking and raking can for holding 1 the grate-bars in their normal positions, an 1 moving said grate-bars of their springs, the the grate-bars to a supplementary of the said gratebars for receiving the clinkers, said supplementary grate comprising substantially horizontally arranged, longitudinally movable plates, rods pivoted to said movable plates, springs on said rods holding the plates in their normal positions, projections on said rods, and an actuating means adapted to periodically engage said projections to move the said rods and thereby the said plates against the actions of their springs, the latter rapidly returning the said plates to their normal positions.

3. A mechanically operated grate comprising longitudinally movable, substantially horizontally arranged grate-bars, supports therefor, means, said grate-bars in their normal positions, projections on said grate-bars, a supplementary grate arranged at the rear of said gratebars for receiving the clinkers, said supplementary grate comprising longitudinally movable, substantially horizontally arranged plates, rods pivoted to said plates, springs on said rods, holding the rods and the said plates in their normal positions, projections on said rods,

on said rods and on said grate-bars, so as to periodically move the said plates and the said grate-bars in opposite directions, the

such as springs, holding the a rotatable shaft, projections thereon, adapted to engage the projections springs rapidly returning the said plates and the said grate-bars to their normal positions, and a source of power for rotating said shaft.

4. A mechanically operated grate comprising longitudinally movable, substantially horizontally arranged grate-bars, supports.

therefor, means, such as springs, holding the said grate-bars in their normal positions, projections on said grate-bars, a supplementary grate arranged at the rear of said grate-bars for receiving the clinkers, said supplementary grate comprising longitudinally movable, substantially horizontally arranged plates, rods pivoted to said plates,

springs on said rods, holding the rods and the said plates in their normal positions, projections on said rods, a rotatable shaft, projections thereon, adapted to engage the projections onsaid rods and on said gratebars, so as to periodically move the said plates and the said grate-bars in opposite directions, the springs rapidly returning'the said plates and the said grate-bars to their normal positions, the arrangement being such that the grate-bars are moved twice to each movement of the said plates and a source of power for rotating said shaft.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

I HUGO BAUER. Witnesses:

ARTHUR LINDENSTEAD, AUGUST FUGGER. 

